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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00f22866958b79e201b8525eb6f51ef805d75905eae3f2c15fe3a248291fbb62' 
  AND token = 'Ywl3HTSoOpy0gRlakueTbuU6qo9zdUNZli/1BjfCqXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}